Drilling attachment for metalworking machines



' Sept. 29, 1936. G. F. YAGER ET AL DRILLING ATTACHMENT FOR METALWORKING MACHINES 7 Sheets-Sheet 1 Filed Jan. 22, 1934 INVENTORS 6am 491. 7% er van Zr J/iii ATTORNEYS Sept. 29, 1936. G. F. YAGER ET AL 55 8 DRILLING ATTACHMENT FOR METALWORKING MACHINES Filed Jan. 22, 1954 7' Sheets-Sheet 2' Gear 91'' Z61 r v 026%; J/eZtZ 1T! n IA ATTORNEYS Sept. 29, 1936-v G. YAGER ET AL DRILLING ATTACHMENT FOR METALWORKING MACHINES Filed Jan. 22, 1934 '7 Sheets-Sheet 3 INVENTOR-S Geor eIJa er 'fidz'rer #646 1 ATTORNEYS G. F. YAGER ET AL Sept. 29, 1936.

DRILLING ATTACHMENT FOR METALWORKING MACHINES 7 Sheets-Sheet 4 Filed Jan. 22, 1934 1 If] (in Sept. 29, 1936. G. F. YAGER ET AL I 2,055,888

DRILLING ATTACHMENT FOR METALWORKI NG MACHINES Filed Jan. 22, 1954 7 Sheets-Sheet 5 Amy w\\ if INVENTORS Gear 6 a er Sept. 29, 1936. YAGER ET AL 2,055,888

DRILLING ATTACHMENT FOR METALWORKING MACHINES Filed Jan. 22, 1934 '7 Sheets-Sheet 6 ZJQZE.

INVENTORIS Gear efifaf er fidzrer flag Q ATTORNEY-S 7'Sheets-Sheet 7 ATTORN EYE Sept. 29, 1936.

F. YAGER ET AL I DRILLIN G ATTACHMENT FOR METALWORKING MACHINES Filed Jan. 22, 1934 Patented Sept. 29, 1936 UNITED STATES PATENT OFFlCE DRILLING ATTACHMENT FOR METAL- WORKING MACHINES Application January 22, 1934, Serial No. 707,790

4 Claims.

This invention relates generally to drilling machines and refers more particularly to drilling attachments for metal working machines of the type set forth in our application, Serial No.

639,354, filed October 24, 1932.

One of the essential objects of the present invention is to provide a drilling attachment of the type described that may be readily applied to the frame of such a metal working machine preferably in place of or as a substitute for the milling attachment set forth in said application and that may be operatively associated with appropriate driving elements of such a machine.

Another object is to provide a drilling attachment wherein provision is made for adjusting the drilling element vertically, horizontally and angularly relative to the work.

Another object is to provide a drilling attachment wherein the drilling element is moved by yieldable means toward and into the work and is moved by cam means out of and away from the work.

Another object is to provide a drilling attachment wherein the cam just mentioned for moving the drilling element is alternately actuable by a coil spring and by parts operatively associated with the driving elements aforesaid of the metal working machine.

Another object is to provide a drilling attachment wherein the coil spring and parts just mentioned are connected in such a way that the spring is wound up by said parts while they are actuating the cam.

Other objects, advantages and novel details of construction of this invention will be made more apparent as this description proceeds, especially when considered in connection with the accompanying drawings, wherein:

Figure l is an end elevation of a metal working machine with a drilling attachment embodying our invention applied thereto showing parts broken away and in section;

Figure 2 is an enlarged fragmentary elevation of the structure illustrated in Figure 1 with parts broken away and in section;

Figure 3 is a view taken at substantially right angles to Figure 2;

Figure 4 is a vertical sectional view taken substantially on the line 44 of Figure 2;

Figure 5 is a horizontal sectional view taken substantially on the line 55 of Figure 3;

Figure 6 is a horizontal sectional view taken substantially on the line ii% of Figure 3;

Figure '7 is a perspective View of the bracket C;

Figure 8 is a perspective view of the body F;

Figure 9 is a perspective view of the plate B;

Figure 10 is a perspective view of the bearing Figure 11 is a view similar to Figure 2, but showing a slight modification;

Figure 12 is a View taken at substantially right angles to Figure 11;

Figure 13 is a. vertical section taken substantially on the line l3l3 of Figure 11;

Figure 14 is a horizontal sectional view taken substantially on the line l4l4 of Figure 11;

Figure 15 is a perspective view of the bracket L;

Figure 16 is a perspective view of the plate M;

Figure 17 is a perspective view of the bracket K;

Figure 18 is a perspective view of the bracket J.

Referring now to the drawings, A is the frame of a metal working machine of the type illustrated in our application, Serial No. 639,354, aforesaid, B is a plate adjustable horizontally on said frame, C is a bracket adjustable horizontally on the plate B in a direction substantially at right angles to the direction in which the plate B is adjustable, D is an upright plate pivoted on a pin E projecting laterally from the frame A and movable in an are over an upstanding portion I of the bracket C, and F is a body adjustable vertically on the plate D and having horizontally and vertically projecting portions 2, 3 and 4, respectively. As shown, the plate B is recessed at 5 to receive a horizontal rib 6 of the frame A and is provided at opposite edges thereof with spaced elongated slots 1 that receive suitable attaching means such as the bolts 8 which engage the frame A. Any suitable means such as the screw 9 journaled in an upstanding hearing In on the frame A and threadedly engaging the plate B may be used as the means for adjusting said plate on the rib 6 of the frame. Extending between the slots 1 and disposed at substantially right angles thereto are parallel keyways I I which receive suitable keys such as l2. The base I3 of the bracket C has corresponding keyways l4 therein registering with the keyways H and receiving the keys l2. Preferably an adjusting screw l5 similar to 9 is employed for moving the bracket C on the plate B. As shown, the screw I5 is journaled in a sectional bearing 11 fastened to an edge of the plate B and threadedly engages the base 13 of the bracket C. Any suitable means such as bolts is carried by the plate B and engaging elongated slots l9 and the base l3 may be used to hold the parts together.

at substantially right angles to the base l3 and is preferably reinforced by vertical and horizon- The upstanding portion l of the bracket C is disposed tal webs 20 and 2|, respectively. The front face 22 of the upstanding portion is flat so as to facilitate movement thereover by the plate D, while the upper edge 23 of said upright portion I is preferably curved and provided with suitable graduations 24. The upstanding portion I of the bracket is also provided with upper and lower rows of elongated slots 25 which are preferably arranged in arcs concentric with the pivot pin E. The upright plate D is elongated in form and has a flat rear face 26 engaging the flat face 22 of the bracket C. Any suitable means such as the bolts 2'! extending through the slots 25 in the upstanding portion I of the bracket C and threadedly engaging the plate D may be used to connect the plate D to the bracket and to hold such plate in adjusted position on the pivot pin E. The front face 28 of the upright plate D is preferably parallel to its rear face 25 and is provided with parallel longitudinally extending keyways 29, while the upper end 35 of said plate is slightly arcuate and is preferably provided at the inner edge with a graduation or mark 3| for use in connection with the graduations 24 on the upper edge of the bracket C. The body F is provided in its rear face with parallel keyways 32 corresponding to and registering with the keyways 29 in the front face of the upright plate D. Any suitable means such as the keys 33 in said registering keyways may be used to guide the body F longitudinally of the plate D, while any suitable means such as a screw 34 journaled in a sectional bearing 35 upon the upper end of the plate D and threadedly engaging the body F may be used to effect such an adjustment. Preferably the rear face of the body F is recessed at 36 below the threaded portion 31 thereof for the reception of the screw 34.

In the present instance, the horizontally extending portion 2 of the body extends over a rotary work dial or turret H of the metal working machine, while the horizontal portion 3 pro jects laterally from the body and is disposed at substantially right angles to the portion 2. The vertically extending portion 4 of the body is above and at the rear end of the horizontal portion 2.

Preferably the work dial H corresponds to the turret B in our application, Serial No. 639,354, and is provided in its periphery with suitable recesses 49 in which the work such as bushings or bearings 4| may be carried. Any suitable means (not shown) may be used to rotate the dial H. Preferably the same means as that illustrated in our application, Serial No. 639,354, is used, however, such means forms no part of the present invention.

4| is a quill slidably mounted in a vertical opening 42 in the horizontal portion 2 of the body, 43 is a spindle rotatably mounted within the quill 4|, 44 are ball bearings for the spindle 43, 45 and 46 respectively are inner and outer races for said ball bearings, 4'1 and 48 respectively are retaining nuts for said races 45 and 46, 49 is a chuck of standard design fixed to the lower end of the spindle 43 below the nuts 41 and 48, and 59 is a drill carried by the chuck 49 and engageable with the work 4| in the dial H. Preferably the construction is such that the work 4| is in proper position to be engaged by the drill 50 when the center 5| of each recess 49 in the dial H is coincident with the axes of the pivot pin E and drill 59. (See Figure 2).

53 is an electric motor mounted on the vertiing a short shaft 54, 55 is a drive shaft sleeved upon and fixed to said motor shaft 54 and extending axially and splined to the walls of an upwardly opening socket 56 in the spindle 43.

In the present construction the drill 55 is moved downwardly toward and into the work 4| by a coil spring 5'! and is withdrawn and moved upwardly from the work by a cam 58. As shown, the spring 5'! is received in a vertical opening 59 in the horizontal portion 2 of the body and seats upon the upper face of a collar 69 clamped upon the quill 4| at the lower end thereof. A top plate 6| on the horizontal portion 2 serves as a closure for the upper end of the opening 59 and as a backer for the upper end of the spring 5? and receives and carries a suitable seal for the drive shaft 55. The cam 58 is fixed to a shaft 63 journaled in a bracket 64 secured to the horizontal portion 3 of the body and is engageable with a roller 65 on a stud 65 projecting laterally from a block 61 secured to the quill 4|. As shown, this block Si is movable vertically in an elongated slot 68 in the horizontal portion 2 of the body.

69 is a pinion fixed to the shaft 53 and meshing with a gear sector IE3 fixed to a shaft TI journaled in the bracket 64 and in a cylindrical portion '52 of the body. Sleeved on and adjustably secured to a lateral projection I3 of the gear sector 10 is a collar 74, while sleeved on the lateral projection 13 between and terminally secured to said collar '14 and cylindrical portion 32 is a coil spring I5 for moving the gear sector 19 in an anti-clockwise direction so that the cam 58 will move in a clockwise direction and let spring 51 move the drill 50 downwardly toward and into the work 4|.

Sleeved upon and fixed to the shaft 'II at the outer end thereof is a tubular portion 5? of a friction clutch element 18, while sleeved on the tubular portion 71 between an adjusting nut 79 and the clutch element 18 is a pulley 33 having a clutch face 3| engaging the clutch face 82 of said element. Fixed to the pulley is a cable 83 having an eye 84 at its lower end receiving a hook 85 pivotally connected to an arm 86 of a bell crank lever 81 corresponding to lever 2 l 5 in our application, Serial No. 639,354, and pivotally mounted at 88 upon the frame A of the metal working machine. Preferably this lever 81 carries a roller 89 which engages a cam on the cam shaft 9| of the machine and is held in such engagement by a coil spring 92 secured to the frame A.

In use, the drill 50 may be adjusted in a horizontal plane forwardly and rearwardly relative to the work 4| in the dial H by turning the screw 9 and may be adjusted in a horizontal plane tangentially to the dial by adjusting the screw |5. To compensate for short and long drills. the body F may be raised or lowered on the upright plate D by loosening and tightening the bolts 93, while the plate D may be swung on its pivot pin E upon adjustment of the bolts 27 to incline the drill 50 relative to the work for drilling inclined holes in said work. The drill 59 will be rotated during rotation of the motor shaft 5 regardless of the position of the drill relative to the work 4| due to the splined connection between the spindle 43 and drive shaft 55. When the bell crank arm 86 is moved upwardly, the coil spring 15 will turn the gear sector '59 anti-clockwise and thus cause cam 58 to let spring 5? move the drill 50 downwardly into the work in the dial 1-1. When the bell crank arm 85 is moved downwardly, the cable 83 will turn the shaft ii and gear sector 10 clockwise and will cause coil spring "I5 spring 51.

to be wound up and cam 58 to be moved in an anti-clockwise direction. As a result, cam 58 will raise the quill (4I) and cause the drill 50 to be withdrawn from the work to its raised position. Of course the dial H will be rotated in timed relation to the movements of the bell crank lever 81 so that the work M will be in proper position each time the drill 5B is lowered by the Any suitable mechanism such as that illustrated in our application, Serial No. 639,354, may be used for this purpose. Moreover, the nut I9 and collar I4 may be adjusted as desired to compensate for any timing irregularities or variations in spring tension. Likewise, the cam 58 may be removed and replaced by other cams of different sizes when it is desired to vary the stroke of the drill 50 relative to the work.

In Figures 11 to 18, inclusive, we have illustrated a slight modification in which the drill 50 is horizontally disposed instead of vertically and is engageable with the work 4| when it is at one side instead of at the top of the dial H. In detail, J is a bracket fixed to the frame A of the machine, K is a bracket adjustable vertically on the bracket J, L is a tilting bracketpivotally connected to the bracket K, M is a plate adjustable horizontally on the tilting bracket L in a direction transverse to the dial H, and N is a body adjustable horizontally on the plate M toward and away from the dial H. Preferably the opposed faces I65 and IIII respectively of the brackets J and K are flat and have registering keyways I02 and I03 therein receiving a suitable key I04. Any suitable means such as a screw I65 threadedly engaging a stud I66 fixed to the frame A and bearing against the lower face of the bracket K may be used to raise the said bracket. Bolts I67 threadedly engaging the bracket J and slidably engaging elongated slots I38 in the bracket K, cooperate with bolts I09 threadedly engaging the bracket K and slidably engaging elongated slots H6 in the bracket J to hold the parts together. As shown, the bracket K straddles the bracket L and is preferably provided with a graduation or mark I I I for use in connection with graduations I I2 on the bracket L when the latter is adjusted about its pivot I I3. In this connection, it will be noted that the pivot H3 is carried by the bracket K and that in addition to bolts Ht threadedly engaging the bracket sides I I and IIS respectively and slidably engaging elongated slots I I! in opposite sides of the bracket L, a turnbuckle I I8 is terminally connected to studs III? and I2!) respectively, rigid with said parts. Preferably an enlargement I2I of the bracket K serves as an abutment for the screw I55 and receives the stud I I9. The opposed faces of the bracket L and plate M have registering keyways I I3 and I I9 respectively which receive keys I22 for guiding the plate M, and a screw I23 journaled in a bearing I24 and threadedly engaging the plate M is preferably used as adjusting means for said plate. Preferably the bearing I24 is rigid with one side of the bracket L and is received in an upwardly opening slot or recess I25 in the bracket K. The opposed faces of the plate M and body N also have registering parallel keyways I26 and I2? receiving keys I28 for guiding the body N, and the adjustment of said body on said plate is preferably accomplished by a screw I29 journaled in a bearing I30 fixed to the rear edge of the plate M and threadedly engaging the body. In this construction an electric motor I3I is carried by a horizontal portion I32 of the body in line with the drill 5%, but the drive between the parts is the same as in Figures 1 to 10, inclusive. The quill I33 to which the chuck I34 is secured is moved toward and into the work by a coil spring I35 and is moved out of and away from the work by a cam I36. As shown, the spring I35 is received in the horizontal opening I 31 in the body and terminally engages a collar I38 on the quill and an end plate I 39 on the body, while the cam I36 is fixed to a shaft I46 journaled in a bracket MI fixed to the body and is engageable with a roller I42 carried by a block I43 fixed to the quill. A pinion 'I 44 is fixed to the shaft I43 and meshes with a gear sector I 45 fixed to a shaft I45 journaled in aligned openings in the body N and bracket I4I. A coil spring MI is sleeved on a tubular projection I48 of the gear sector and is terminally secured to the body N and to a collar' I 49 adjustable on the projection I48. Sleeved upon and fixed to the shaft I46 at the outer end thereof is a tubular. portion I55 of a friction clutch element' I5I, while sleeved on the tubular portion I50 between an adjusting nut I52 and the clutch element I 5| is a pulley I53 having a clutch face I54 engaging the clutch face I55 of said element I5 I. Fixed to the pulley I53 is a cable I56 having an eye I5'I at its lower end receiving a hook I58 pivotally connected to the arm 33 of the bell crank lever 81.

In use, the drill 50 may be adjusted in a horizontal plane forwardly and rearwardly relative to the work M in the dial H by turning the screw I29 and may be adjusted in a horizontal plane transversely of the dial by adjusting the screw I23. The body N may be raised or lowered on the bracket J by turning the screw I65 after the bolts I01 and I09 have been loosened, and may be swung about the pivot I I3 upon adjustment of the turnbuckle II8 to incline the drill 5!! relative to the work for drilling inclined holes. When the bell crank arm 86 is moved upwardly, the coil spring I4'I will turn the gear sector I45 anti-clockwise and thus cause cam I36 to let spring I35 move the drill 5II into the work M in the dial. When the bell crank arm 86 is moved downwardly, the cable I56 will turn the shaft I46 and gear sector I 45 clockwise and will cause coil spring I4'I to be wound up and cam I36 to be moved in an anticlockwise direction. As a result, the quill I33 will be moved to the right and will thus cause the drill 53 to be withdrawn from the work to its retracted position. Of course the dial H will be rotated in timed relation to the movements of the bell crank lever 81 so that the work will be in proper position each time the drill is moved to the left by the spring I35. Any suitable mechanism such as that illustrated in our application, Serial No. 639,354, may be used for this purpose.

What we claim as our invention is:

1. In a drilling machine, a work holder, a drill spindle movable longitudinally toward and from work in said holder, a cam mounted to oscillate in opposite directions, means including a spring for turning the cam in one direction, means for positively turning the cam in the opposite direction against the tension of said spring, means including a spring operable when the cam is turned in the first mentioned direction to feed the drill to work in said holder, and a cam follower operable by the cam when it is turned in the second mentioned direction to retract the drill from the work.

2. In a drilling machine, a work holder, a drill spindle movable longitudinally toward and from work in said holder, a cam mounted to oscillate in opposite directions, means for turning the cam in one direction, said means being yieldable to permit turning movement of said cam in the opposite direction, means for positively turning the cam in the opposite direction, said last mentioned means being reversible to permit movement of the cam in the first mentioned direction, the first and second means just mentioned being operable alternately for actuating said cam, means including a spring operable when the cam is turned in the first mentioned direction to feed the drill to work in said holder, and a cam follower operable by the cam when it is turned in the second mentioned direction to retract the drill from the work.

3. A drilling attachment for a, metal working machine having a work holder, comprising a quill movable toward and from the work holder, a cam operable to positively move the quill away from the work holder, a shaft for said cam, a second shaft substantially parallel to the first mentioned shaft, 2, driving connection between said shafts, a first spring for yieldingly turning the second mentioned shaft in one direction so that the quill will be released by said cam, a second spring operable when the quill is released by said cam to yieldingly feed the quill toward the work holder, and means subsequently operable to wind up the first spring and positively turn the second shaft and cam in the opposite direction so that the quill will be positively retracted from the work holder.

4. In a drilling machine having a work holder, a rotating drill spindle movable toward and from said work holder, a support for said spindle including a reciprocating quill having two projections at spaced points thereof, actuating means for the quill including a first spring and a cam, said first spring being engageable with one of said projections for yieldingly feeding the drill spindle toward the work holder, and said cam being engageable with the other of said projections to positively retract the drill spindle from the work holder, said cam being oscillatable in one direction to retract the spindle and in the opposite direction to permit the feeding of the spindle by said first spring, and actuating means for the cam including a second spring and a rotary element, the rotary element being operable to turn the cam in the first mentioned direction, and said second spring being operable to turn the cam in the second mentioned direction.

GEORGE F. YAGER. OLIVER J. HEATH. 

